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code_segments/segment_129.txt

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+For an array $u_1, u_2, \ldots, u_n$, define
+
+  * a prefix maximum as an index $i$ such that $u_i>u_j$ for all $j<i$;    * a suffix maximum as an index $i$ such that $u_i>u_j$ for all $j>i$;    * an ascent as an index $i$ ($i>1$) such that $u_i>u_{i-1}$. 
+
+You are given three cost arrays: $[a_1, a_2, \ldots, a_n]$, $[b_1, b_2, \ldots, b_n]$, and $[c_0, c_1, \ldots, c_{n-1}]$.
+
+Define the cost of an array that has $x$ prefix maximums, $y$ suffix maximums, and $z$ ascents as $a_x\cdot b_y\cdot c_z$.
+
+Let the sum of costs of all permutations of $1,2,\ldots,n$ be $f(n)$. Find $f(1)$, $f(2)$, ..., $f(n)$ modulo $998\,244\,353$.
+
+The first line contains an integer $n$ ($1\le n\le 700$).
+
+The second line contains $n$ integers $a_1,\ldots,a_n$ ($0\le a_i<998\,244\,353$).
+
+The third line contains $n$ integers $b_1,\ldots,b_n$ ($0\le b_i<998\,244\,353$).
+
+The fourth line contains $n$ integers $c_0,\ldots,c_{n-1}$ ($0\le c_i<998\,244\,353$).
+
+Print $n$ integers: the $i$-th one is $f(i)$ modulo $998\,244\,353$.
+
+In the second example:
+
+  * Consider permutation $[1,2,3]$. Indices $1,2,3$ are prefix maximums. Index $3$ is the only suffix maximum. Indices $2,3$ are ascents. In conclusion, it has $3$ prefix maximums, $1$ suffix maximums, and $2$ ascents. Therefore, its cost is $a_3b_1c_2=12$.    * Permutation $[1,3,2]$ has $2$ prefix maximums, $2$ suffix maximums, and $1$ ascent. Its cost is $6$.    * Permutation $[2,1,3]$ has $2$ prefix maximums, $1$ suffix maximum, and $1$ ascent. Its cost is $4$.    * Permutation $[2,3,1]$ has $2$ prefix maximums, $2$ suffix maximums, and $1$ ascent. Its cost is $6$.    * Permutation $[3,1,2]$ has $1$ prefix maximum, $2$ suffix maximums, and $1$ ascent. Its cost is $3$.    * Permutation $[3,2,1]$ has $1$ prefix maximum, $3$ suffix maximums, and $0$ ascents. Its cost is $3$. 
+
+The sum of all permutations' costs is $34$, so $f(3)=34$.